void func(void)
{
    int i = 1;
    int j = 2;
    int k = i + j;
    return;
}

int main()
{
    func();
    int g = 3;
    int h = 4;
    int i = 1;
    int j = 2;
    int f = (g + h) - (i + j);
    return 0;
}